Java

HTTP POST JSON and Parse JSON Response

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Demonstrates how to send a JSON POST and then parse the JSON response. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkJsonObject json = new CkJsonObject();

    success = json.LoadFile("qa_data/json/jsonBodyForHttpPost.json");
    if (success == false) {
        System.out.println(json.lastErrorText());
        return;
        }

    CkHttp http = new CkHttp();

    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpJson("POST","https://test.something.com/XYZ/API/v1/CreditInsuranceCalculator/CalculatePremiums",json,"application/json",resp);
    if (success == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    CkJsonObject jsonResp = new CkJsonObject();
    jsonResp.Load(resp.bodyStr());

    jsonResp.put_EmitCompact(false);
    System.out.println(jsonResp.emit());

    // The JSON response to be parsed looks like this:
    // {
    //   "LifeAmount": 513.85,
    //   "LifeResidualAmount": 123.38,
    //   "CriticalIllnessAmount": 0,
    //   "CriticalIllnessResidualAmount": 0,
    //   "DisabilityAmount": 881.70,
    //   "PolicyFee": 0.00,
    //   "PolicyFeeSecondary": 0,
    //   "PolicyFeeHidden": 50.00,
    //   "PolicyFeeHiddenSecondary": 0
    // }

    // We can get the floating point numbers as strings.  Then convert to double
    // using the appropriate string-to-double conversion for your programming language.
    // For example, in C++ use atof.  In C# use Convert.ToDouble.  
    String lifeAmount = jsonResp.stringOf("LifeAmount");
    String lifeResidualAmount = jsonResp.stringOf("LifeResidualAmount");

    System.out.println("LifeAmount = " + lifeAmount);
    System.out.println("LifeResidualAmount = " + lifeResidualAmount);
  }
}